Water-gage cock.



0. D. .DONAVAN. WATER GAGE COCK APPLICATION FILED IAN. 31,1913.

Patented Aug: 12, 1913'.

WlT-NESSESZ w 1 VENTOR.

ATTORNEY.

CARL D. DONAVAN, OF LOS ANGELES, CALIFORNIA.

WATER-GAGE COCK.

roeaaee.

Specification of Letters Patent.

Patented Aug. 12,1913.

Application filed January 31, 1913. Serial No. 745,495.

T 0 all whom it may concern Be it known that I, CARL D. DoNAvAN, a citizen of the United States of America, residing at Los Angeles, in the county of Los Angeles, State of California, have invented a certain new and useful Water- Gage Cock; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved water gage cock designed for use on boilers or the like to test the level of water therein, and it may be said to consist in the provision of the novel and advantageous features and in the novel and improved construction, arrangement, and combination of parts as will be apparent from the description and claim which follow hereinafter.

In the usual construction of water gage cooks, the valve is disposed 011 the interior of the cock whereby in use the interior of the cock is in open communication with the boiler and becomes clogged with incrusted sediment in consequence of which the cock does not work well and must often be removed from the boiler and cleaned out.

One object of this invention is to provide a novel and improved water gage cook the construction of which is such that it obviates the inconvenience and expense incident to keeping water gage cocks of usual construction clean and in good working order.

Further objects of the invention are to provide a novel and improved water gage cock of the nature specified which is simple in construction, economical to manufacture, install, and maintain in use, efi'ective in action, and in which the parts may be easily and quickly assembled or demounted.

Other objects and the advantages of the invention will be apparent to those skilled in the art from a consideration of the following description of the preferred form of construction embodying it, taken in connection with the accompanying drawings in which Figure 1 is an elevational view of the front plate of a boiler having water gage cocks aifixed thereon, Fig. 2 is an enlarged elevational view of a water gage cock aflixed on a fragment of the front plate of the boiler; Fig. 8 is a partly broken and sectional view taken on the line 33 of Fig. 2, and Fig. 4 is a partly broken view" of the stem having the valve at one end thereof and having the threaded sleeve secured at the other end thereof.

On the front plate 5 of the boiler 6 are arranged the usual glass gage 7 and a suit able number of the gage cocks 8.

The improved construction of the gage cock 8 is as follows: The plug 9 is provided with a longitudinal opening 10 therethrough and has its rear end portlon 11 formed conical and threaded to screw into the front plate 5 of the boiler 6. A conical seat 12 for the valve 13 is formed in the rear end of the plug 9, and a stem 14 of less diameter than the opening 10 is afliXed to the valve 13 and extends beyond the threaded forward end portion 15preferably of reduced sizeof the plug 9. On the forward end portion of the stem 14 is secured, preferably by a pin 16 passed through the stem, a sleeve 17 provided on the forward end portion thereof with a thread 18-preferably left-handadapted to screw in the forward end portion of a gland 19 which'latter has the rear end portion thereof adapted to screw on the threaded forward end portion 15 of the plug 9. Packing 20 may be disposed between the forward end of the plug 9 and the shoulder 21 in the interior of the gland 19, and a handwheel 22 may be mounted fast at the forward end of the sleeve 17 to facilitate turning the sleeve 17 to open or close the valve 13. A discharge nipple 23 in communication with the opening 10 is suitably a'fiiXed on the underside of the plug 9.

From the foregoing it will be understood that the valve 13 is opened by turning the handwheel 22 to the left-the usual wayand is closed by turning the handwheel to the right. In consequence of the valve 13 normally closing the opening 10 at the rear end of the plug 9 the interior of the plug does not become clogged with incrusted sedimentary matter from the water in the boiler. Also it will be noted that the construction permits of the valve 13 being easily ground on the seat 12 by first unscrewing the gland 19 from the plug 9 and then turning the stem 14: to turn the valve while the latter is held against the seat either by pressure of steam or forward pull on the stem.

The device has the merit of being simple in construction and yet effective for accomplishing the objects of the invention.

I claim:

,An improved water gage cock adapted to be affixed on a boiler and comprising a plug provided with a longitudinal opening therethrough and having a seat in the rear end thereof, a valve adapted to fit on said seat, a stem of less diameter than said longitudinal opening, said stem affixed to said valve and extending through the longitudinal opening and beyond the forward end portion of the plug, a gland having the rear end portion thereof adapted to screw n the forward end portion of the plug, a sleeve secured fast on the forward end portion of the stem, said sleeve provided with a thread on the forward end portion thereof adapted to screw in the forward end portion of said Copies of this patent may be obtained'for five cents each, by addressing the Commissioner of Patents.

gland to turn the stem and thereby move the valve to open or close the valve, and a discharge nipple in communication with said CARL D. DONAVAN.

WVitnesses:

FRED A. MANSFIELD, ALEX. H. LIDDERS.

Washington, D. C. 

